The real comparisons should actually be the best of clan vs the best of IS. As far as tech vs tech goes, if you are bringing a sub-optimal loadout you can only blame yourself not the tech. So, let's compare some mechs shall we?
Lights:
FS9 vs ACH
FS9 gets slightly more speed and slightly more sustained firepower
ACH gets ECM, clan XL engine, and slightly bigger alpha strikes.
This seems pretty fair to me. Advantages are situational and I don't think either mech has a huge margin over the other.
Mediums:
BJ-1X vs SCR
BJ has better mid-range damage potential and more survivability due to overtuned structure quirks. (Survivability has already been called out as an outlier and will be nerfed soon).
SCR has more build options and can outperform a BJ-1X in certain situations.
SPL boating makes it a superior brawler. Streak boating makes it better for anti-light duty. Standard meta builds give it an advantage over the BJ-1X in range.
Overall the overtuned structure quirks make the BJ-1X a better pick currently for most situations.
Heavys:
I don't think there is a definite "best" mech on the IS side currently, there are chassis that excel at certain roles.
QKD-5K is great for ERLL boating and can beat anything the clan can field for extreme long range.
EBJ or TBR with 3xLPL is great for mid-long range and can dominate at 600-700m range.
BLK-6-KNT is probably the best mid-range IS heavy and is slightly stronger than the meta EBJ/TBR builds.
SPL + SRM TBR is in my opinion still the strongest heavy brawler.
Is clan or IS side stronger for heavys? I think it depends on what you want to do with them. No side is inherently stronger, you can make builds work for whatever strategy you want.
Assaults
DWF or EXE vs Mauler or BNC-3M
As far as pure firepower goes, nothing beats the DWF. The KGC that Gyrok has been saying is "as good as the DWF" simply isn't. Not even close. The Mauler is the closest to the DWF if you want a pure DPS build and needs to make serious tradeoffs in survivability if it wants to keep up in damage potential.
The BNC-3M is better than the DWF at laser vomit trading corners for obvious reasons. However, the EXE actually excels at this role also. The BNC-3M basically gets shorter burn times and slightly more heat efficient damage at the tradeoff of range, MASC, and clan XL engine. I prefer the BNC-3M personally, but then again Gas Guzzler has pulled 4300 damage in a CW drop out of a single Executioner and I can't argue it's effectiveness.
What Assault is the best? Depends on pilot preference and role IMO.
Do you disagree with any of my assessments? Please show me where the IS mechs are flat out better than clan options. I think you'll find that if you look at the chassis objectively, balance is pretty good right now overall.
Edited by pwnface, 22 January 2016 - 12:44 PM.