I didn't realise the prices were so different either.
The F Type Cab in 3 litre supercharged format is £58k.
That is 0-60mph in 5.1 seconds, so plenty fast enough.
The SL400 is also a 3 litre, I presume turbo or supercharged, can't find any info on the Merc site though?
But anyway, it is a 3 litre and 0-60 in 5.2 seconds, so plenty quick enough, and is £72,500.
I'm quite shocked at the price of the SL400, the SL500 is £82,000, compared with £67,000 for the S model F-Type. 4.6 vs 'only' 4.8 for the F-Type.
But the Supercharged V8 F-Type is £79k and 4.2 seconds to 60mph.
But that is SL63 territory, and that is £112,000.
I presumed they would be about the same price points, didn't think there would be up to £30,000 difference.
You could buy a nice 50k miles 10 plate Range Rover for the days you need more comfort and space with that much difference.
Or an ML of course.