I would say that the K90 is better than the K95. It's just that the K95 is more user forgiving so it may seem better to you. But if you think you could handle it, K90's the way to go. And maybe you should try demoing?
I purchased a used K95 with the intention of buying 2 new frames to go along with it. I played with it for a while (along with other racquets) and liked it. I had made up my mind to purchase the next two until I made a trip to a local chain tennis/golf store. My son is a golfer, so I mainly took him to demo some new drivers. The store had an inside court so I had my son come over and hit some with me. I picked up the K90 out of curiosity mainly and IMO it just felt so much better to me in every respect, that I ended up buying two.
I have a couple of thoughts on the power of this racquet. It is a low power racquet, but if you can generate a good amount of racquet head speed, you can smoke it with this racquet. A couple of recommendations are to string with a multifillament with a descent drop in tension from mid plus or oversize racquets. I first strung my racquets with natural gut at 65 lbs. and was having some problems with pace. I now have these strung with gut at around 54 lbs. and this helped quite a bit. Also, I hit the ball rather flat. If you hit with a great deal of topspin, it is much tougher to create pace.
If you are young and strong, you may be able to use a poly in half of the racquet or the entire thing. Just keep in mind, you may have to experiment a bit.
I don't feel the K95 is much less forgiving if any. You really have to pay attention with both racquets. Both are demanding racquets, but I truly believe each can help your game if you have the time and dedication to work. By that I mean, the K90 especially is one of the most accurate racquets I have ever used. I can definatly serve to certain areas in the box and come reasonably close consistently. You can also place groundstrokes closer to your target without worrying too much about hitting long, however if you have to really overswing to get the racquet around, the control will probably not be of much benefit. You need to decide. Also, there is better touch around the net with the K90. As I said, I feel the K90 does everything slightly better.
With all this said, I have made a switch to the K Blade Tour. I did this because I am no longer a young buck and the K Blade gives me close to the same performance with a weight savings of about 3/4 of an ounce. When I played people that could consistently create depth, it was difficult to get through it quickly enough. If I have time to set up for a shot, I can usually crush the ball with the K90. Good Luck.