All Vans in my opinion run big. I always go half size down on every style and that seems to be perfect but I can get into a full size down in the slip ons simply because the last shape is wide and the opening is rather forgiving. But the EG Vans use the exact same everything (last, construction, etc.) that it shouldn't be any different than say, the classics.
What other shoes do you wear in what sizes? I don't have any experience with Vans, but wear 8 in Viberg 2030, 7.5 in all other Viberg lasts, 8.5 Adidas Stan Smith, 8 in Quoddy Mocs, and 8E AE Strands. I was leaning towards going TTS with 8.5.