So, some things I remember (I have both lights, both moded)!
Some threads you may wanna look at:
SF10 - Sofirn SF10 and SF12 review; sofirn aa lights (sf10/sf12/sf14/etc.); $6.95!! Sofirn SF10 AA/14500 battery with special price for 5 days
SF14 (old version) - DOUBLE 1 AND ½ "REVIEW": Sofirn SP10A and Sofirn SF14 *[added night / distance shots]; Part 1-Sofirn SF14 Flashlight Review.; Part 2-Sofirn SF14 Flashlight Review-Begining; Part 3-Sofirn SF14 Flashlight Review.; Review // Sofirn SF14 - Dual Chemistry-AA size; Sofirn SF14 - Misleading Runtime (about runtime);
SF14 (V1 vs V2) - Sofirn SF14 V1 vs V2
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SF10 - PWM; 4 modes (H-M-L-ML + Strobe with double click); can’t remember if it has memory; bigger and larger flashlight, modder friendly, NW tint (yellowish or rosy tints, depends); tough host
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SF14 (old version) - No PWMN; 3 modes (L-M-H); no Memory; thinner, lighter, modder friendly, NW tint (white, sometimes yellowish), throwier (+70mts distance)
Hope this helps! About the new version of SF14, take a look at the thread above 
EDIT: Took too much time to write, ActiveAl beat me in an elegant way 