Question about T25 vs. T28 turbo

[BoostedTRD]

I know since T25 turbo is smaller it spools up a lot quicker probably around 1500-2500 rpm if I am not wrong. Do you guys know at what rpm the T28 kicks in, I am guessing probably around 3000-3500 I could be wrong but just want to know.

I am still debating if I should go with the T28 or T25. The T28 will probably need a rebuild since its not spinning freely it could so be since its sitting around for a while now. It could just be gunk, I will be taking it to my mechanic this weekend to see what he says. I have rebuild a t3/t4 turbocharger so its not a big deal to rebuild it, it just takes a bit since I have to send the turbine wheels and shaft to get balanced.

Since our cars redline at 6250 rpm vs my old Honda 8500-9200rpm I am not sure if it is better to go with t25 so boost kicks in quicker and I can use it all the way to redline or use t28 and only use it for 3200 rpms. What do you guys think?