I have used both the DEI tape in 2" and the reflective/kevlar adhered with a spray mount and tape, I figured you had used the sheet as I could not see any lines. (I will now be doing the same because yours looks so good)
Epic work, so clean.
You will no doubt see a difference - even with the lower quality stuff (think Lowes or HD tape) you will find that it really reflects heat well. (just the glue fails at like 200-300 degrees)
(dont fall into the its gold trap, silver works better till you hit the big $ material.)