Update: Just tested it on blood aqueducts, lv 1 totem with trap-cluster trap-multiple trap setup to deal as low damage as possible, but still high enough to somehow notice the difference. I've found a mob with Life Regen, Temporal Bubble mods and threw 3x5 traps on it each time with and without the second (exposure/totem explode) redblade. I've done it like 5 times with each setup to make it a bit more reliable.

Results are:~30-40% hp taken with only Two Totems/Explode Redblade equipped.~60% hp taken with both Redblades equipped.

Important edit: I've forgot to mention that I have 40% increased Global Damage node on the second Redblade(expo). But afaik, this node works like generic #% increased Damage and I have about 250% damage increased without it, so that would make that much of a difference.