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I would imagine if you kept the duration up there, the performance would be similar. 6000-6200 isn't a stretch for a hydraulic roller with the correct springs and other valvetrain components.
On my 445ci Windsor, I'm using a hydraulic roller, with a 250 degree duration at .050". My hydraulic roller cam should be pretty similar to that 254 duration solid roller in the engine above. I have springs to keep the valves where they're supposed to be and used titanium retainers to lighten the valvetrain.
But you're right about solid rollers. Even with the high end pressure fed lifters, the manufacturers still recommend that you have them rebuilt every so often. Solid roller lifters have to endure the impact of the lifter bouncing on the lobe that is a result of valve lash.
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