Well, first of all they are truly Heng Long, not Mato. Got the little HL dragon emblem right on 'em.

Dimensions of the M26 Pershing (or Snow Leopard) Dimension: L 18" x W 9" x H 8"

Tiger 1: L 21" x W 9" x 7.5"

(converted from metric)
- Full Length:530mm
- Full Width: 232mm
- Full Height: 188mm

Got these measurements from the web so I hope they're accurate. Aside from that, they're almost identical.