I agree with
@felladrol - orals are typically a poor selection for mass accrual - or atleast as a direct benefit.
Yes - they will increase anabolism and yes that will result in increased LBM assuming diet & training are in place, however injectables are typically a far better selection for this end.
Orals shine in either their acute effects on performance and their cosmetic impacts. Var is generally a better around compound than tbol. Both will give a fuller looker and have a noticeable impact on strength and endurance - however var beats tbol on both counts.
Both are "mild" systemically in terms of stress/impact compared to other orals - however neither are "mild" in terms of effects. Both will incur significant performance gains.
Var does not typically have much impact on hair even though it is DHT based as it does not interact well with the receptor at the follicle. Tbol can cause blood pressure issues and "compartmentation" (back pumps, shin splints etc) but this does not effect everyone.
Var is generally the better compound for most uses but is more expensive - it does tend to "dry you out" which can make explosive work a little less comfortable - but is nowhere near as impacting as agents such as mast etc.
Typically if you can spring the extra dollar for var it would probably be a better selection. Tbol is enjoyable too though and is much more cost effective. I doubt in terms of perform gains and LBM accrual over the course of a cycle there would be any significant difference between effective doses of either compound.