I totally understand. There is still no replacement for displacement.
However the D3V with an 8 inch Subwoofer will probably outperform the T5V in almost every aspect.
I say almost because if you want specifically the Kick bass (the punch in the chest area kind of Bass) properties of music you need a minimum size for the woofer as it is an area a subwoofer cannot cover as it goes higher than 200-300 hz. In this case your only solution is a 5+ inch woofer. The woofer of the D3V is too small for this. You need a woofer
that can move a lot of air at once. That can only be done through big cone area or big excursion. However a small woofer with long excursion still cannot sound as tight as a bigger membrane when it comes to modelling kick drums as long throw woofers especially in small sizes tend to become heavy thus being more „draggy“
in their speed. Its a vicious circle.