Depends.
Wetsuits can make you quicker - you are more buoyant and have a better position in the water.
Pools give you a rest at every end when you kick off, so it depends on what turns you do, and how quick they are.
Losing weight might make you slower too - more muscle and less fat means lower buoyancy, and a tendency for your legs to sink.
@NotThamesWater started
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Depends.
Wetsuits can make you quicker - you are more buoyant and have a better position in the water.
Pools give you a rest at every end when you kick off, so it depends on what turns you do, and how quick they are.
Losing weight might make you slower too - more muscle and less fat means lower buoyancy, and a tendency for your legs to sink.