Originally Posted by
EDFW
The site says that you would still have to reserve seats for Eurostar trains and gives a price of 15-20 EUR per reservation which would put the price for the three trains the OP wants to take to at least 171 EUR for 2nd class, 200 EUR for 1st class.
Looking at individual point-to-point fares I get the following for Eurostar direct connections with seat reservation included:
Rome-Venice: 61.80 EUR (2nd class) / 89.30 EUR (1st class)
Venice-Florence: 35.20 EUR (2nd class) / 53.20 EUR (1st class)
Florence-Rome: 39.90 EUR (2nd class) / 56.10 (1st class)
Doing the math you would arrive at 136.90 EUR (2nd class) or 198.60 EUR (1st class) with individual tickets.
Now taking into account that you would have to go to the station anyway, either to make the reservation when you use the EURail pass or to buy the tickets, I think it's definitely better to just get individual tickets.
Thank you for the helpful comparison. Where were you able to find the prices for the Eurostar trains?