Your problem isn't related to equipment. While there is, of course, some variation, the fact remains that any regular inverted rubber is going to be responsive to a good serve or a loaded topspin. You just need to get better at reading spin, and accommodating it, with bat angle and touch.
Similarly with your serves. Everyone finds this - up to a certain level their serves are fine, even an advantage, but the next level up, they're not so effective, and the level above that they're a liability. You need to tighten up the serves - keep them low over the net. Long serves must be genuinely long - bouncing on the last 3-4 inches of the table, and short serves need to be both short and low over the net, with quality spin, and, ideally, bouncing exactly twice, not three or four times, as this usually means the flight of the ball is a little high.
By all means change your equipment, but it won't make a blind bit of difference to your results - you'll still fail to block loaded topspins, hit serves in the net, long, or off the side, and you'll still serve with insufficient spin, too slowly, mid-length, perfect for your opponent to attack without risk.
Instead, try to find some people who can generate a lot of spin, on serve, or against push, or drive, and work on exercises where you have to read and respond to the spin. Similarly, practice your serves until you have consistent height, and length, and are producing a lot of high quality spin. You can do all of this with Hurricane 3, Rakza 7, any Tensor, any generic cheap Chinese rubber.
You're not alone - I'm in the same boat - so is anyone who is trying to improve. You'll always find that people a couple of levels above you are just better: they produce more spin, have better disguise, better variation, can read your spin, see through your disguise, spot your variation, and will pounce upon your weak shots. Changing your rubbers will simply make you $100 poorer. Unless your rubbers have actually perished or are damaged beyond repair, or are very very old, you'd be better off spending that money on a few hours of quality coaching, or a video camera or tripod, a box of balls, or bribing a much better player with a few beers, dinner, whatever they can be bribed with
If the Rakza packaging says "Made in Germany" then it's definitely a Tensor (or at least, definitely ESN).