The Pioneer-cabins are closer to the swimming pool, restaurant and shop.
However, that means they might be in a bit of a more noisy part (but with all the construction going on for Village Nature I guess that i'ts hit or miss with the noise around your cabin).
With the Pioneer-cabin you also get a free complimentary bottle of water and a cleaning-package in the cabin (however, the cleaning-package is also free for all other cabins by redeeming the coupon you get when checking in).
Finally, the Pioneer-cabins also have wired internet (so a ethernet-connection), as opposed to the other cabins that have no internet access whatsoever (so no wifi). There is wifi in around the reception however but that has limited range.
(and I just noticed that I seem to be quite fond of the word "however"