The main difference on is mainly the same as the previous one only difference is the introduction of the er PPC which gives it a bit more sniping capability with a few sacrifice on heat management it also sports a slightly more powerful engine giving it a bit more speed but the removal of the heavy LLaser and additional twin pulse med laser gives it a better short range attack and weaker med range assault capability also it have less ammo with its srm 6 and autocannon 20 which might prove a hinder in long fights but a bit better armor might help a bit
I don't think this build could be very cool. You shouldn't use the ERPPC's to brawl, but it sure is tempting. It kinda feels like a less cool Highlander. so, I'd say 2-5, since your mostly a sniper in such a slow mech.
Sad part is that there really isnt much to snipe with such a low point of origin for the ErPPCs and this guy runs WAY too hot to want to brawl with either ERPPCs or regulars. Turn those MPlasers into regular Mlasers and get some DHS in that thing! Hell, remove artemis if you have to but you need better heat!