Happy new year and welcome to the forum. I play with both the Dumas HS Sprint and the AquaCraft VS1. Both are great fun little boats. The Dumas hull is shorter and wider, its tunnel is also 1/32 shallower than the VS1, = hull turns right as well as left and handles great, but you NEED flat like glass water for best results. The VS1, longer, narrower and deeper tunnel is better when the water is less than flat, also the VS1 is more oval racer, the cowling center is offset so it turns better right than left. The VS1 will need more mods to the hull than the Dumas to run brushless elect power. At the end of the day both boats give very similar performance when running similar set ups. My Hot Shot Sprint on 3s runs mid 30's, on 4s it gets real fun with that little boat runnin mid/upper 40's. Three things important when tuning a tunnel boat set up, center line of prop shaft ride height, thrust angle of prop shaft, hulls center of gravity, get those right you'll have a fun, good handling play toy. I run my Dumas on 3 or 4s and my VS1 on 5 or 6s(un tested on 6)
Here is my set up for the Dumas Sprint, motor AquaCraft UL1 2030 kv. atop a K&B lower, Seaking 120 amp ESC, batt = 4s 5000mah 50c, top speed 46 mph on a Prather stainless 215 prop. The K&B lower is bullet proof jest keep the shaft well greased, the draw back is with the K&B you are limited to a max of 42 mm prop dia, an O. S. lower you can run larger dia props and gain a mph or two.
PROBOAT BlackJack 24", ShockWave 26"
MRP U-31, 3 tunnels VS1, MRP Bud Light, Dumas HS Sprint
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