The 201-2 and 15-91 have either the .53 or the .6. Both my 201s and my 91 have the .6. But I'd only need a straight stitch for precise top and edge seams so power isn't everything. Cotton broadcloth doesn't need piercing power but 14 oz. denim does. Not sure.
My Pfaff 30 has a
1.4 amp motor and can outsew anything in my fleet except the industrial I just got (and I don't even have that in my home yet because I have to remove the head and motor from the table and take the table apart just to fit it all in my station wagon). I have a
1.2 amp Selectomatic (just checked) that is nowhere near my straight stitch Pfaff 30 or even my 1.3 Pfaff 130s which are rated by some as semi-industrial. The Selectomatic is a cute machine, but that dog just don't hunt.
Selectomatic:
Hah!
Don't get me wrong. I like vintage Brothers. (I actually think their straight stitchers are better than their zig-zags.) But against the 30? Who you kiddin'?