Shoes, are newer models the same as previous

Some models change quite a bit from year to year, others not so much. I'm not sure what word on the street is about how much Adidas tends to change their models.

Don't know specifically about the Adidas line, but I can tell you that the answer to your question is most likely "it depends."  Not what you wanted to hear I know. 

For the most part I've found that model year changes are like cars... they may tweak a few things here and there but overall its the same car... I mean shoe.  I actually use this to my advantage in that I'll wait and find a few of "last years" model for deep discounts and stock up.  I usually always a year behind on my ASICS.  

That said, shoe manufactures (just like auto manufactures) will from time to time make major changes that alter the way the shoe fits and feels, so be careful and make sure you know what you like about your current shoe, and what they changed between model years.

Very often change...always wise to try on.  I ran in Brooks Adrenalines for several years and they made very trivial changes from 2006-2008...then, starting with the "Adrenaline GTS 9," they began to make significant changes, to the point that with the Adrenaline 10, I had to return it to the store after two trial runs.  I've stocked up on every pair of the "9's" that I could find in my size and am looking for a new shoe that works as well as the older Adrenaline models.  So...yeah...be careful about your purchase unless someone really vouches for the new one as being more-or-less identical to the previous model.

BTW:  Look around online and in discount shoe outlets for clearance pairs of your old shoe.

NO, they change year to year. Sometimes not for the better.

Asics Gel Nimbus 10 worked great. (I bought 6 pair) Now I have Asics Gel Nimbus 12 and get blisters after 5miles. I'll try the Nimbus 13 and see what happens.

Sometimes they insist on screwing up a good thing.

as others have said so far it depends. I know that the shoes I wear (Asics and Brooks), with the asics at least the will change the design and look of the top every other year and the other years they will usually make a change to the actual shoe fit and design. However, according to my running store Guru whom I trust, the changes are usually small things and most people find improvement in them, though not always. for instance - the Gel Nimbus with Asics is basically the same shoe as the original one - and I just bought the Gel Nimbus 12. It works for me as well as the Nimbus 10 did before.

I would check with your running store guy and find out. they talk to the sales reps and the companies and test the shoes so they should know about any changes.

it's a secret ploy to keep me going back to my running shop.  If I could just buy the same shoes over and over again, I wouldn't need to try the new models on in the store and could just order them on line. 

but that's OK.  I like the people in my local running shop.

No. Newer models are never the same as previous models. However, sometimes changes are only cosmetic and other times there are more substantial changes. My main training shoe, Nike Air Pegasus, has undergone 8-9 model changes over the years I've used it. I have an old pair from years ago and they are nothing like the new models. None of the changes have made them unusable for me, but they have been noticeable.

You can often read reviews of new models online at Runners World or similar that will tell if the changes are significant. People also post reviews about shoes at some of the online retailers.

I recently saw an excellent resource on the S-Lab shoe development laboratory and prototype manufacturing facility at Salomon. We don't think of Salomon as a road running brand (because they aren't, yet...) but they have been a prominent trail running and adventure racing brand. I was sponored by them for ultra-running and adventure racing.

Salomon and other brands like Nike, Adidas, etc have new rapid prototyping and design facilities that are closely linked to their manufacturing facilities, albeit remotely. They can, and do, change a design very quickly.

There is a small segment of the specialty running consumership who finds a shoe and wants to stick with it. Road Runner Sports has done an awesome job of marketing to that tendency with their "Classics" and "Endangered" marketing of some running models, and they are a great resource for extinct shoe models.

However, the much larger part of the consumership is not interested in consistency and simply wants something new. Trends like "barefoot running" fuel that motive to constantly change models.

As a result, it's rare to see a running company keep something exactly the same from manufacturing run to manufacturing run.

Yes! I can attest to this too. I wear the women's Brooks Adrenaline. I had to lace the newer models a little differently to fix the problems I encountered. I laced them to be tighter on my heel and the slipping issue went away so I have stayed with this shoe.

I tried switching shoes initially when I had a problem with the new Brooks, but it didn't go well... resulted in some injury, can't remember what it was now.