2025 Grand Design Momentum 376THS vs 2024 Keystone Fuzion 373

Detailed Comparison

Two popular options on many shoppers' shortlists — the 2025 Grand Design Momentum 376THS and the 2024 Keystone Fuzion 373. Let's see how they compare across the specs that matter most.

In terms of footprint, the Grand Design Momentum 376THS stretches 28.5 ft while the Keystone Fuzion 373 spans 41.0 ft. Weight-wise, the Keystone Fuzion 373 is the lighter rig at 10,700 lbs versus 10,700 lbs.

The Grand Design Momentum 376THS sleeps 9 while the Keystone Fuzion 373 accommodates 4. Slide-outs play a role in livability: the Grand Design Momentum 376THS has 0 and the Keystone Fuzion 373 has 2.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Grand Design Momentum 376THS at 71 gallons versus 54 gallons. Solar-wise, you get 200W on the Grand Design Momentum 376THS and 150W on the Keystone Fuzion 373. Battery banks are 150 Ah and 150 Ah.

At $160,000 MSRP for the Grand Design Momentum 376THS and $159,000 for the Keystone Fuzion 373, the Keystone Fuzion 373 saves you $1,000. With only a 1% price difference, the choice comes down to features rather than cost.

If you're traveling with a family, look for the model with more sleeping positions and better storage. Boondockers: look at the fresh water capacity and solar/battery systems — they determine how long you can stay out. For the full-time RV lifestyle, every gallon of tank capacity and every inch of counter space counts.

Both options have earned their place in the market. Your trip style and budget should be the final tiebreakers.