Sanwa buttons are sanwa buttons, no difference in any stick you get them in. The Dragon uses the exact same, just a different color. The lever is the same deal as well. Sanwa JLF in both cases. If you are going to want to make it stiffer, get a new heavier spring.
Also, this is off topic. This is the TE2/TE2+/TES+ EZ MOD thread which has nothing to do with the buttons and levers installed in these sticks.
[list] MadCatz XBox 360 TE2 shell from a local trade
 @“Jasen Hicks” 's TE2 EZ MOD kit
 @armi0024 & @SusanInParadise 's presoldered headers Brook UFB PCB ( I just removed the plastic guide on the J5 pins so that the EZ MOD and UFB would play nice together )
 @armi0024 & @SusanInParadise 's PAS Universal S Adapter Plate
 @mdsfx MadCatz TE2 red bezel
 Seimitsu LS-38 SC lever from @Needlecrash
 Seimitsu LB-35 red ball top from @hibachifinal
 Seimitsu PS-14-GN-C colored rims from @hashrate
 Seimitsu PS-14-GN-C black plungers & rims from @slaycruz
 Seimitsu PS-14-DN-C colored rims from @TRIEU
[*] Seimitsu PS-14-DN-C black plungers from @“NiFTY NuGGET”
Please watch the video for the mod, I explain where to install the little plastic jumpers in there. its not hard, you just install them by putting them on a set of pins so that the buttons behave as you want them to.