Different kind of tablebase usage in top engines?

[Jouni]

[d]8/8/2k5/2r5/8/3RP3/4K3/8 w - - 0 1

Analysis by PlentyChess 7.0.37:
...
1.Kf3 Rf5+ 2.Kg4 Rf8 3.Rd1 Rg8+ 4.Kf5 Re8 5.Re1 Kd5 6.Kf6 Ke4 7.Kg7 Kd3 8.e4
= (0.00) Depth: 82/59 00:00:06 99919kN, tb=1607291

Analysis by Reckless 0.9.0-dev-0dd5b9ac (TB access working):
...
1.Kf3 Rf5+ 2.Kg4 Rf8 3.e4 Re8 4.Rd4 Kc5 5.Rd5+ Kc6
= (0.00) Depth: 50/10 00:00:02 22944kN

Analysis by Stockfish 17.1:
...
1.Kf3 Rf5+ 2.Kg4 Rf8 3.e4 Re8 4.Kf5 Rf8+ 5.Ke5 Re8+ 6.Kf4 Rf8+
= (0.00) Depth: 58/13 00:00:03 10870kN, tb=17

0/17/1.6 million?

[syzygy]

Different ways of using tablebases when the root position is already in the TBs (and is drawn).