Am I crazy or do silent and bore up piston heads look identical to you too?

[HelloKitty]

Systema Silent Piston Head:


Systema Bore Up Piston Head:




This is especially worrisome because I plan to buy a Systema PSG-1 full tune up kit and, you guessed it, the piston head in the FTK looks just like the bore-up piston head from the bore-up kit.
I would like to assume that the FTK has the bore up kit parts included as well, but since the description of the FTK never explicitly mentions including bore up components I'm not sure what to think.

Full Tune Up Kit: http://redwolfairsoft.com/redwolf/ai...1_New_Type.htm

Bore up kit: http://redwolfairsoft.com/redwolf/ai..._for_PSG_1.htm

[sushicake]

The boreup's is a little bigger. While the silent uses the standard size.

[CDN_Stalker]

Looks like the bore up comes with a silent piston head as part of the set.

[Kos-Mos]

FTK is standars size, with silent head set.

Bore-up is larger, also with silent head set (since if you need to bore-up your cylinder, chances are that you are shooting a hot spring anyways).

[ThunderCactus]

Same design, different dimensions.