Yes. TDEE is going to vary from person to person. Some people will just naturally burn more energy doing nothing, while other people will burn less. There’s not a single known reason; I recall seeing something very interesting that linked it to gut flora, but I don’t know whatever came of that.

If you really want to burn calories, you need to make your body as inefficient as possible. That means packing on muscle; build a weight routine with the goal of adding as much strength and mass as possible. That means high weights, low reps, medium number of sets, and hit each major body part about weekly. Before I fucked my shoulder, that was chest, back, legs, rest, shoulders/arms, rest, rest, with cardio 6 days/week, and abs 6 days/week. (Abdominals and erector spinae should be endurance rather than raw mass/strength.) Keep your cardio all LISS; don’t exceed zone 3 at all, and work towards about an hour a day of cardio. Oh, and you gotta track your intake. Too often people will get the exercise ‘right’, but utterly fail to deal with what they eat. While you can outrun a bad diet, it’s really, really hard, and the older you get, the harder it is.

Before I’ve wrecked my shoulder–currently trying to get surgery to repair a high-grade tear in a rotator cuff tendon–I was largely avoiding running. Now that I can only do cardio, I’m trying to do a lot of zone 3 training, and at least one day each week where I’m running (zone 4/5) for an hour. I’m to the point where a 5k would not be too difficult, even though I wouldn’t have a competitive time. If you’re going to do cardio, IMO an eliptical is the easiest way to get into zone training, and stay in the desired zone.