Wilcom Truesizer and Pulse Ambassador are very limited free programs, suitable for beginners, you can resize, mirror image, reformat and rotate designs with Wilcom and you can create your own colour palette, change colours of designs and reformat with Pulse.
I'm not familiar with Eos.

When you are serious about editing designs or digitising your own, you are ready for grown up programs like Embird or PE Design, (not PE design Light, which is a very basic communication program though it may do other things such as re-size, rotate, mirror image, I haven't used it much except to, occasionally, transfer designs to the Brother card.)

For my money it is Embird all the way. "Scrap the rest and stick with the best."
Hugs n roses, Meganne
Melide Menschen Designs

I don't know about the Eos, but someone mentioned yesterday the wingssystem.com had something easy to use. I thought about it, but I'm just as confused as you are. hehehe...I don't have Wilcom, but do have Pulse (thought about buying it for digitizing), I'm borrowing my daughters PED, but without actually reading the "manual" in my hand, it is a hit and miss with me. I tried Embird, but didn't take advantage of it. I might try it again, maybe that will help me make up my mind on a digitizer. hummm. Thanks for posting this, it might have cleared my boggled mind up a little more. hehehehe.

I also use pes format. I have Custom Works which can do basic stuff. Many of the people I know who have Babylock machines use Master Works. Neither are ever mentioned here. I don't know why. I am not interested in digitizing (I am computer stupid) so I can't compare the different programs. Are you able to go to several dealers and test drive their software?