If it's even a real Alpina chip (which I doubt) there was a lot more that Alpina did to the M30 than just chip it. As you haven't done that same work to your M30 I wouldn't put a chip that was tuned for a partiular build M30 into your car when you don't have that build and already have a very good chip for your car.
I've only got a temporary EAT chip in my car as I'm waiting for Mark to burn one for my EWS II codes. But if your chip does to your M30 what this chip is doing to my M60 I rally doubt you'll find much better chip-wise. The Dinan chip I used to have was better than the stock chip (and the stock chip was apparently a bit better than the regular M60 chips). But this 93 octane EAT chip is way better than the Dinan chip.
Do yourself a favor and stick with your EAT chip and put your money towards other things to improve your driving experience. Like even just getting it all running & functioning properly. You've been doing a good job of that so far, keep it up.
Cosmos Black/Black 1995 540iA M-Sport
BMW Individual Exclusive Edition, 1 of 65 total, 9/25/95 Build