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ecf82 pentode instead of ef86

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Hi
Anyoune tried the pentode part of ecf82 instead of ef86?
just found one ecf82 in the drawer.
I saw it is used for tremolo oscilator in vox ac10, but I am actually looking for the sound of the ef86 channel. (ac15 heritage)

I built the latter with an ef85 pentode, it has a deep bass, mild and vibrating tone, but all the highs.. are gone. It sounds just.. natural.
No compression and attack on the highs
I even better like it in triode mode - natural sound.
A good overdrive in the low to mid range (pentode), but no sparkle ):
 
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