The Thor suffers from being a fatass Loki on a pogo stick, which is, essentially, what it is in CBT.
The Thor is 5 tons heavier than the Loki: this is exclusively for the JJs.
The Thor has 26 tons of podspace for weapons, ammo, electronics; the Loki 28.
The Thor has 9.5? tons of armor, the Loki 8?
The Loki has a Targeting computer at 3 tons,
I Thinkthe Thor has that three tons in the engine, presumably to move that five extra tons as fast as the Loki moves itself.
The Thor has 4 DHS, the Loki 3.
So assuming the Internals are otherwise the same we have.
Thor:
26Weapons/elec + 9.5ArmorFF + 15Engine + 4DHS +(3.5InternalStructure? + 4Gyro +3Cockpit)= 65 tons + 5JumpJets = 70 tons.
Loki:
28Weapons/elec + 8ArmorStandard + 12Engine + 3DHS + 3TargetingComputer + (3.5InternalStructure? + 4Gyro +3Cockpit) = 64.5? + .5 mini-fridge?

= 65
Thus what we have here is the Thor paying essentially 8 tons for its JJs, so we have a 62 ton Targetingcomputerless Loki that jumps.
If Sarna is correct that the Loki only has 8 tons
standard armor then the Summoner should have 35% more of the Loki's hitpoints IF we count the difference between standard and FF in MWLL, if we don't then it should be 12.5% more, either way more than 5%.
Other than that the Loki was essentially built to be more weapon heavy from the same mold as the Thor.
Thus the Thor must make maximum use of its JJs, which even with the improvements to the system in .4, is still difficult to utilize on a map like DeathValley.
Now for the crux of the problem IMO
The Loki should only have 3 DHS... the mwll has 6... the reason for this I'm fairly sure is that 3 ton Targeting computer doesn't exist in MWLL so the tonnage had to go somewhere, I assume the Apods went into electronics instead.
Meanwhile the Thor has its canon 4 DHS. Thus the Thor should be able to fire more than the Loki without overheating like a bitch, but in reality, it can't cause the Loki has more heatsinks.
We will see how the devs handle the targeting computer problem going into the future.