Based on a quick spreadsheet, it looks like the V3 PACMiC will return less profit per contract, but because they are cheaper, will take shorter to pay off, which has an effect of providing a higher APR.

Should be around an 8.5% APR, will have to double check my spreadsheets though to make sure that is about right.

(This assumes no difficulty changes, will have to add that into my spreadsheet to see the effects of what a few percent increases will do.  Should make profits a little higher, but I doubt by much.)