Is there anything in particular you would like to know?
I have had both - at the same time - but since joining a larger workshop with a LARGE format saw I just kept the CS50.
They are similar yet quite different. The CS50 is very portable but that portability and lack of weight _can_be a problem for some ripping tasks. The CS70 is heavier and with all the bells & whistles it isn't exactly "portable" in my book. It does everything a little bit better I think but all in all the CS50 is a great little machine for ripping small stuff, cutting flooring and trim to size. I don't use it as often nowadays but the cut quality and accuracy is great. Blade brake is great to have. The sliding mechanism on the CS50 is a bit easier but it isn't bad at all on the CS70.
The CS50 is too small to handle sheet goods very well - even with the add on tables. The CS70 does a better job with sheet goods but you would appreciate a hand when feeding them sheets through the machine.
Dust extraction is pretty good on both - except for ripping without the shroud in place where it is still good. They are fairly quiet (at least the CS50) and I find that once they are set up properly the repeatability is excellent even when removing add ons and putting them back on.
All in all the CS70 is not really comparable to a larger format saw but would serve most well as a "do it all" saw in a smaller workshop whereas the CS50 would be to limited I think - even when paired with a plunge saw with rails.
Compared to the brand new digital fence Felder Format saw we have in the workshop the CS70 is still severely limited in capacity and accuracy. I decided to keep the little one as it does a really good job on smaller jobs on site and is easy on the back but to be honest I sometimes miss the CS70 with parallel fence (LA) and one "side extension" on site.
For stability and capacity the CS70 is a "better" saw as in stronger and more stable and with all the add ons I could do most stuff with it - but with all the add ons the foot print was quite large in my small shop and removing extensions was a bit tedious in the long run. I am quite happy with the CS50 and I find the smaller footprint an advantage and coupled with a few other saws I wouldn't be without anyway (Kapex, Mafell rail saw) I find the CS50 worthwhile.
If you are working with mdf or any thicker stock on a regular basis I don't think a CS50 is the ticket but if you can find the space and £££ $$$ for a CS70 set up you have a whole lot of option that rival the CS70 in capacity.
Confusing or helping you? I don't know. Just typing from the top of my head. Have you any specific questions - ask away.
