The skills assessment is the same for 187/190
if I were you I would go 190, a friend of mine came over via subclass 186 and hated his workplace, he tried to stick it out but ended up leaving after 7 months and went back to the UK which cost him a substantial amount of money.
Although there are many positive sponsored employments I would consider your options, atleast with the 190 you are only limited to staying in the state.
This is only my opinion, and I wish you success on which ever route you decide to take.
Regards, H