BE vs DTP a couple of differences suggested
but you do not get temp control or pressure on a Silvia either ...
I have never seen a tear-down - volunteers ?
One more thing about the BE it has a pressure gauge which is a pointer if your tamping and grinding going in the right direction. Some say it's not important but seeing Rocket and other Top Espresso machine makers have it on their machines it's there as a another aid to help you get the most out of your shot pulling technique.
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Sounds like you have a plan lol. The only feature on the BE that you cannot do on the DTP is the temperature increase or decrease on the PID. It may not be a big deal if you know you'll be sticking to a preferred bean, but may prove more useful if you are going to experiment with different roast types etc. Something I have to give serious thought to as I'am still new to all this myself and keen to try quite a wide range of beans and roast types. That's the only short coming of the DTP.
but you do not get temp control or pressure on a Silvia either ...
I have never seen a tear-down - volunteers ?