roughly same position, but mostly worse for the gladiator. Before the BOB even started it was just about fully replaced by the Hurricane. You only found it in really desperate places. Like the BEF where they had no supplies, no spare parts, operated off of a frozen lake as a runway, etc.
The Gladiator had a top speed of only 210, whereas the Cr.42 had a top speed of 270, only 20mph slower than the G.50 which replaced it. Naturally you can see the gap was much smaller, so some Cr.42s stuck around. The gap between Gladiator and Hurricane was so much larger that they were rushed out of service and didn't even stick around as trainers. The 4 Vickers .303s on the Gladiator were really underpowered in a time when even 8x Browning .303s were thought to be too weak. At least on the Cr.42 the relative weaponry was the same -- 2x 12.7mm. Light, but quite capable.
Overall the Gladiator turned much tighter, was much slower with way worse rate of climb, and way worse weaponry. The Brit Gladiators trounced Cr.42s over Egypt but you could say this was due to discipline, training, and experience of the Brit pilots in comparison to their foes. The Cr.42s trounced SAAF Gladiators in separate engagements.
Generally, skill changes the equation, but the Cr.42 would trounce a gladiator any day of the week on even footing. Think F6F vs A6m [edit: bad example, maybe?]. Can't turn as well but has it in all other areas where it counts.