What explains the differences in top tier module requirements?

When it comes to rank 8 vehicles.

For the M1A2 SEP V2
Laser rangefinder tier lll: 1x tier l mod = 16k RP + 2x tier ll mod - 18k RP + LRF 20k RP = 54k RP
Thermals tier IV: 54k RP + tier lll mod 20k RP + thermals 15k RP = 89k RP
Top shell tier IV: 89k RP + shell 15k RP = 104k RP total

For the M1A2 SEP
Laser rangefinder tier lll: 1x tier l mod = 16k RP + 2x tier ll mod - 18k RP + LRF 20k RP = 54k RP
Thermals tier IV: 54k RP + tier lll mod 20k RP + thermals 15k RP = 89k RP
Top shell tier IV: 89k RP + shell 15k RP = 104k RP total

For the Leopard 2A7V
Thermals tier lll: 1x tier l mod 22k RP + 2k tier ll mod 30k RP + thermals 16k RP = 68k RP
Laser rangefinder tier IV: 68k RP + 2x tier lll mod 32k RP + LRF 17k RP = 117k RP
Top shell tier IV: 117k RP + shell 17k RP = 134k RP total

For the Leopard 2 PSO
Thermals tier lll: 1x tier l mod 22k RP + 2x tier ll mod 30k RP + thermals 16k RP = 68k RP
Laser rangefinder tier IV: 68k RP + 2x tier lll mod 32k RP + LRF 17k RP = 117k RP
Top shell tier IV: 117k RP + shell 17k RP = 134k RP total

For the T-90M
Laser rangefinder tier ll: 1x tier l mod 15k RP + LRF 12k RP = 27k RP
Thermals tier ll 27k RP + thermals 12k RP = 39k RP
Top shell tier IV: 39k RP + 1x tier ll mod 12k RP + 3x tier lll mod 45k RP = 81k RP total

For the T-80BVM
Laser rangefinder tier ll: 1x tier l mod 15k RP + LRF 12k RP = 27k RP
Thermals tier lll: 27k RP + 2x tier ll mod 24k RP + thermal 15k RP = 66k RP
Top shell tier IV: 66k RP + 2x tier lll mod 30k RP + shell 17k RP = 113k RP total


So out of these vehicles, it only requires 27k RP for Russia to unlock the first important module, with US requiring double at 54k and Germany requires even more at 68k RP.

The T-90M only needs 81k RP to get these 3 important modules at the low end where Germany requires 50k RP more at 134k RP for some reason.

This is not counting parts and FPE, which would lower the required RP for all.
These costs are not equal either however.
M1A2 V2: 4800 + 5400 for parts and FPE = 10.200 RP
M1A2 Sep: 4800 + 4200 for both things = 10.000 RP

Leopard 2A7V: 6600 + 4500 = 11.100 RP
Leopard 2 PSO: 6300 + 3600 = 9.900 RP

T-90M: 4500 + 3600 = 8.100 RP
T-80BVM: 4500 + 3600 = 8.100 RP

Here Russia with the lowest amount of RP required as well.


Looking at the rank 7 vehicles comparing 10.3:

M1 Abrams
Thermals tier lll: 1x tier l mod 9100RP + 2x tier ll mod 17000 RP + thermal 14k RP = 40.100RP
Laser rangefinder tier IV: 40k RP + 1x tier lll mod 14k RP + LRF 12k RP = 66k RP
Top shell tier IV: 66k RP + shell 12k RP = 78k RP total.

Leopard 2A4
Thermals tier lll: 1x tier 1 mod 13k RP + 2x tier ll mod 24k RP + thermals 13k RP = 50k RP
Laser rangefinder tier IV: 50k RP + 2x tier lll mod 26k RP + LRF 17k RP = 93k RP
Top shell tier IV: 93k RP + shell 17k RP = 110k RP total.

T-80B
Laser rangefinder tier ll: 1x tier l mod 11k RP + LRF 9900 RP = 20.900 RP
Thermals tier IV: 21k RP + 2x tier ll mod 20k RP + 3x tier lll mod 33k RP = 74k RP.
Top shell tier IV: 74k RP + shell 14k RP = 88k RP total.

Which means a Leopard 2A4 requires more RP for these modules at 10.3 than a T-90M does as a rank 8 at 11.7 and on par with a BVM?

Am I wrong in expecting MBTs at the same BR at the same rank to have the same RP requirements for important modules?
Germany requiring vastly more both in rank 7 and in rank 8 with Russia getting their modules early and at half the cost of US and Germany.

Other nations are generally even worse simply because they are still forced to play with HEATFS forever and do not have a tier l APFSDS shell.

They are rather substantial differences and in reality this gets significantly bigger when some vehicles are able to get competitive earlier which will further accelerate their progress.

I do not understand why modules are not in a fixed location for all these vehicles, 80k for a T-90 and 130k for a Leopard doesn’t make sense.

Does no one have an answer for this?