Comparison, this is hard for me. You can see all the specs on the manufacturer’s websites. I really like the Sisma, but I really like my Mesa WD800 and 800+. I’m fortunate to have them all and be able to keep them all. I’ve always gotten compliments on my sound no matter what I’ve played through so maybe it’s my playing and knowing how to work with a given amp to achieve what I’m going after. I’m not meaning to sound like an ass but I don’t know how to explain it otherwise. The Mesa gear sounds big and punchy, to use your term, but so does the Sisma head. I guess I don’t think in terms of all the catch phrases here on TB. They are both great products made very well. I recently had dealings with Mesa about a repair and it was handled professionally and to my satisfaction. I’ve been dealing with Jad Freer Audio for about 6 months now and recently more closer with the purchase of Sisma. They too are very professional and I’m very happy with them also. I can’t say one is better than the other. It’s up to the individual to like what they are hearing and if the whichever amp has the right controls and feature set that one is looking for. Bottom line for the three heads, they all sound different, they are all well made and I like and am keeping them all. All three have plenty of power for me. I can get a great sound out of them all. You can’t go wrong with the Mesa Subway series and from the short time I’ve had my Capo and Sisma you can’t go wrong with Jad Freer Audio. I’m happy and done chasing the “tone”. This ramble may not answer the questions asked but it’s the best I could do and I hope it helps.

