Bass traps: RPG Modex Corner vs ASC Tube Traps vs?

Hi, I am looking to add some bass traps to my room. I am thinking about either the RPG Modex Corner or the ASC Tube Traps. It appears from the data that the ASC Tube Traps have a higher absorption coefficient than the RPG Modex Corner but it is difficult compare because the Tube Traps are 4' tall and the Modex Corners are 2' tall. I was thinking about stacking 2 Modex Corners but I am not sure if doing so will significantly increase its absorption abilities.

Has anyone tried either or both of these products? Is there anyone else I should be looking at?

Thank you,
Tommy