David, no Sir. The N Frame is heavier in weight. The "L" frame came about to correct certain deficiencies of the "K" frame. The "K" .357 sometimes had problems when firing the 125 gr and lighter projectiles. Problems included bad forcing cone erosion and splitting. This seemed to stem from a thin forcing cone wall at the 6:00 position. This thinner point was to accommodate the ejector rod. The "L" frame change that design. The "N" predates the "L" frame. Which is best? Neither! It all depends on the use or purpose of the gun. The "N" is a heaver frame bigger grips, a real boat anchor. "L's" and "K's" are similar in grip size but generally have full lugs and beefier in the barrel to frame area. The "K" frame or medium size will do about anything and seem to balance or handle better or least for some.

N frame is a beast!

The n frame is the heavy one. Good luck

I have a model 19 with a K frame. Plenty heavy. The L frame should really tame the 357mag.

N frame is heavier