pff i dont think brolly could compete with ssj2. he was the same level as vegeta vs imperfect cell. i never saw lightning in his aura. majin vegeta, or ssj2 goku would pummel him.
why i say such thing is, brolly wasnt fast he was mainly all muscle. look at his normal form and his "ascended" saiyan form. and yes ascended saiyan isnt the same as ssj2. its just the most powerful ssj form.
ssj/ascended ssj/ssj2/ascended ssj2/ssj3
with ascended ssj2 i mean majin vegeta.
vegeta said it himself after watching gohan powerup to ssj2 that he wasnt as powerfull as he was against cell, due to the lack of training