difference between quark air master and monster pro

ok, then the air master insn´t a good choice for me.
i want build a hyper7 buggy and maybe my x2 crt truggy.
every vehicle get a motor, but the esc should be used in both cars. same for the a123 packs (*s2p).
i´m looking for a cheap alternative for a esc.

heatsink i can do for myself, i got a cnc machine.