RE: Cannisters...what are the differences between the mfg?
you ask too much for a single soul to answer. The cans you mentioned, are all good. If you need power curves, there are none.
All cans can be made to run well if the header length is OK. Too short a header will make the can peaky. Not like a tuned pipe, but still not very smooth. With header too long, you loose power.