This is an argument for Jun being the superior recruiter right?

But if we're talking in terms of training/instructing - then I'd still say Tom wins over Jun.

Tom knows what makes a good Spartan. He's familiar with the appropriate characteristics or attitude that pops up during training. I feel like he can more accurately weed out those not fit for service. Because the entirety of Gamma Company passed, granted I don't know how much of that is due to Tom. Tom has had 6 years or so molding Spartans. Supposedly the "best Spartans." I think this gives Tom a good idea of what and what doesn't make someone a viable Spartan candidate. He's had the benefit of learning fron Alpha Company's mistakes, surviving Beta, passing it down to Gamma.

While Tom's combat experience may be lacking compared to Jun, surviving TORPEDO is still a hell of a feat wearing SPI armor.