Yes, those are both males. Both have pronounced pre-anal pores and both have pronounced tail-base bulges. Between the ages of 8 months and 12 months they will start to vie for territory and you will see fighting. The reason the one is so much smaller is probably because the larger male is bullying it. You'd do well to seperate them both now before it escalates into anything big.
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Lucien

1.1 Columbian Redtail Boa (BCI)(Sutekh and Isis)
5.11.Leopard geckos (1.2 Blizzards (Caine, Phoenix, and Mirage), 0.2 Tangerine Albinos (Tequila Sunrise ...Tiki for short, and Casper), 1.0 Tremper Albino (Mycah), 0.3 Poss. Het. Albino (Annika, Lace, and Aris), 1.1 dbl. het blizzard x tang albino (Malice, Malfeas), 1.0 Full Stripe Chocolate Tremper Albino (Discord), 0.1 pastel (Raven) and 1.2 Normals)
0.1 Savannah Monitor (Kiros) (R.I.P. November 18, 2005)
13 rats (plus pups)
2 Dogs (Loki and Storm)
2 cats (Ashe and Hercules)

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