Probably neither are the right choice. The 1506 is most commonly a c machine which has a smaller embroidery field. Great if you are not interested in doing large jacket backs. The dual function machines are also a more limited embroidery field last I looked. You want a full size machine IMO so you can do full size jacket backs and hats. Dual function machines are a ok concept most owners of them say they aren't as good as the single function machines.
We have 11 SWF heads so we like the,. But I'd stick with full size machines.
Swf 1506 vs 1504 dual function
