I'm looking to pair my GK 400RB 210 combo with another 2x10 cabinet and I think 2 choices I might have narrowed it down to are the GK SBX210 and the hartke 2.5 XL. I could probably get them for relatively the same price. I know the sensitivity on the GK cab is 102 and the hartke is 99 and the GK has an adjustable horn level. How good are the 3 db difference and the adjustable horn? Will it even make that much of a difference?