Hyperlite Landlock vs. Inland Surfer Red Tide

I am a big guy 6'3" and 280 lbs. I currently have a hyperlite landlock 5'11" and like it but I have been told it is a slow board. I've been looking at the Inland Surfer Red Tide. It touts itself as a good and fast board for bigger riders... For those of you who have tried both boards is there a big difference in the speed of the two boards? I need a faster board that will work a better on smaller waves when we surf the shallow waters of Utah Lake (9-12 feet). In deeper lakes the wave is just fine for the Landlock. Any opinions of the speed of these two boards? Thanks!