Eezi-awn k9 vs Front Runner slimline2 mounting system

[WannaLC]

I've read several reviews on these two racks, but I'm wondering what rack has the better mounting system to the Land Cruiser. It seems like the Slimline2 rails may be more secure than the k9 track system. I like the longer length option on the k9, but the mounting system and number of accessories may push me to the front runner. Thoughts?