Id say probably Not, at least nothing anyone would recomend mixing. Id say why not got the route other have reported with success. Using Spike on work out days when you want that BOOST for AWESOME training and then use the HOT-ROX on non weights days for the Fat-Burning and muscle preseration effect.
Seems like best of both worlds. That intense training session should allow enough energy exspense and anabolic effect to well replace that days dose of a Fat-Burner then you get the Fat-Burner on the off days.
Thats the plan Ive seen posted that seemed very solid.
Hope that helps,