2024 Keystone Sprinter 3190RLS vs 2025 Heartland Milestone 370FLMB

Detailed Comparison

Before committing to the 2024 Keystone Sprinter 3190RLS or the 2025 Heartland Milestone 370FLMB, it pays to understand exactly where each one shines and where it falls short.

Starting with size, the Keystone Sprinter 3190RLS measures 34.5 ft long and tips the scales at 9,800 lbs dry weight. The Heartland Milestone 370FLMB comes in at 38.0 ft with a dry weight of 10,700 lbs. That gives the Heartland Milestone 370FLMB roughly 3.5 extra feet of length.

The Keystone Sprinter 3190RLS sleeps 10 while the Heartland Milestone 370FLMB accommodates 6. Slide-outs play a role in livability: the Keystone Sprinter 3190RLS has 3 and the Heartland Milestone 370FLMB has 3.

For boondocking enthusiasts, tank sizes matter. Fresh water capacity goes to the Keystone Sprinter 3190RLS at 90 gallons versus 74 gallons. Solar-wise, you get 150W on the Keystone Sprinter 3190RLS and 250W on the Heartland Milestone 370FLMB. Battery banks are 350 Ah and 250 Ah.

At $169,000 MSRP for the Keystone Sprinter 3190RLS and $173,000 for the Heartland Milestone 370FLMB, the Keystone Sprinter 3190RLS saves you $4,000. With only a 2% 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.

Ultimately, both rigs have their merits — test drive each one and see which floor plan speaks to your lifestyle.