Which of the Henschel kits gives you the most options for a late or final variant.

I recommend # 6254.It's pretty detailed nice build.

http://www.missing-lynx.com/reviews/german/dragonkingtiger_csewell.html


#6303 with the zimm is also very good

http://www.perthmilitarymodelling.com/reviews/vehicles/dragon/dr6303.html

The question is somewhat unclear, but...
If we're talking about 1/35th scale and late/final configurations of the vehicle there is no such thing as FINAL kit in DML range. As for what can be called late, you might choose between their 6208/6254 and 6232/6209 kits. I grouped them into couples because what you get in boxes is virtually the same for each pair, plus figures and brass shells in 6232 and 6254. In addition, the second couple has an option of sprockets with 18 or 9 teeth. 6209 and 'Black Knight' kits have better commander cupolas and transparent parts for periscopes, but almost no decals OOB.Of all the kits I've told you about 6208 is the earliest kit produced and, therefore, the poorest (no metal barrel etc.).
The contents of all the kits mentioned can be checked here:

http://www.1999.co.jp/eng/10036963
http://www.1999.co.jp/eng/10145428
http://www.1999.co.jp/eng/10043587
http://www.1999.co.jp/eng/10153715
http://www.1999.co.jp/eng/10040915

HTH and happy modelling, Paul

If you want the final variant, as issued in March, 1945, get the Academy kit (also offered by Eduard). Academy kits are well-engineered and assemble easily. Their downfall is usually poor research (they have the planet's laziest research staff), but in this case, they had numerous other kits to examine before offering their version. I'd suggest replacing the anti-grenade mesh and frame on the forward engine deck vents with Aber's version, as Academy decided to eliminate the curved side section. A couple of knocked out tanks from the Ruhr Pocket fighting lack that frame and screen altogether, though it's possible they were dislodged by the internal explosion.
The kit comes with narrow transportation tracks, as several tanks photographed from that batch never got their battle tracks (supplies had been cut off by Allied action).

If you want your final result to be 'looks like a King Tiger from 10 feet' than yes, Academy is a kit of choice.