Spoke to Ernest Langdon himself at SHOT Show in the Beretta booth. He explained why he designed the 92 LTT the way he did. He used the M9A3/Vertec slide, with the M9A1 Frame. Trigger job is nice and crisp - and he prefers the full grip style, vs the Vertec grip, as there's more surface area for gripping the gun, compared to the M9A3/Vertec style. My only wish is that he included the M9A3 style decocker - it's angled slightly upwards so it will not accidentally get pushed down and decock while racking.
If I were to get another Beretta, I'd go for the 92 Elite LTT, as I already have a M9A3.