What do the different tube amp types mean?

These are the choices we have in tube amplifier.
Topology in circuitry;
**single ended,
** tubes used,DHT/indirectly heated,,, like 300b,kt88,,211,,845.
*push-pull,
**tube used DHT or not DHT,,300b,,kt88
*OTL,
3 types of topology of tube OTL
** tube used,,,like 300b,211 0r 6as7,6c33c,7242 kt88,etc.
***different tubes used in one of these amps have different sound and over 1000 combinations/sounds.

Realdeal, there are no practical OTLs using 300bs, 211s or KT88s; just for the record.

Ralph,I think Realdeal is right,I also made an OTL using single KR52B,5R4GYB  tube rectified  with 600V on the plate.,no feedback and what a transparency.

@amfibius  Thank you so much for the nicely concise overview of how the tubes work.  This was simple, and to the point. I hadn't come across something like this until just now. :)

Realdeal, there are no practical OTLs using 300bs, 211s or KT88s; just for the record???

Am I reading this correctly??? If so I can tell you that Transcendent Sound has amazing OTL for sale.

http://www.transcendentsound.com/Products.html

http://www.transcendentsound.com/Masterpiece.html
http://www.transcendentsound.com/300B_OTL.html