M1 Legacy or iM1 for iPad?

[brooster1]

I have 3.2 gig i5 iMac and a 12.9 iPad Pro. I prefer recording on a Tascam Dp-03 over DAW. I also have a RISE 49 with Equator and NOISE on my iPad Pro. The Equator software on the iMac is superior to the NOISE on the iPad and bluetooth is very inconsistant.

Should I get the M1 legacy or the iM1 for iPad? I can't find a comparison of the two.

bruce