Another train question

Why not just buy your tickets on loco2.com? They don't charge booking fees (like RailEurope does) and it's very user friendly for Americans. Just be sure to select Euros from the dropdown menu and not British Pounds.

https://loco2.com

The Super Venezia deal is a separate deal from Base, Economy, or SuperEconomy. Ignore those if the Super Venezia is a better deal. The Regionali connections are always the same price, do not have seat reservations, and there is a 4 hour time window that they can be used. So if you miss a train, you can get the next one. The Super Venezia deal is train specific, so make the train from Venice or forfeit the ticket. If that happened, you could book a new full fare ticket for the Freccia portion and the Regionali tickets will still be valid for later trains inside the original 4 hour window.

Sam, is it the same or different for base, economy and super economy as far if you miss the train connection?

is it the same or different for base, economy and super economy as far if you miss the train connection?

Yes, it is the same, your ticket is then a worthless piece of paper.
Before the train departs, the following rules apply (copy paste from Trenitalia website):

SUPER ECONOMY
Changes Not Allowed
Refunds Not Allowed
Access to other trains Not Allowed

ECONOMY
Booking changes (date/time) allowed upon payment of a change fee
Refunds Not Allowed
Access to other trains Not Allowed
Change of booking/ticket: You can do this up until the departure of the booked train, only to change the departure date or time with the same category of train or service purchased, in which case, you must make the ticket exchange (at the sales points where this operation is permitted), paying the difference with respect to the Base price available at the time of the change. The new ticket has the same features as the Base ticket.

BASE
Booking changes (date/time) Allowed and free of charge, unlimited number of times up to departure
Ticket changes Allowed and free of charge, subject to payment of a price difference if applicable. Unlimited number of times up to departure
Refunds Allowed and subject to a deduction
Access to other trains Allowed subject to a surcharge
Booking changes: allowed Until departure of the booked train: an unlimited number of times
After departure of the train: once only until one hour following departure

My point is that if you go Manarola via Florence with Regionali connections from there, you will have a ticket with a seat reservation on a Freccia train to Florence and Regionali tickets which have a 4 hour window to be used to get to Manarola. If you missed the original Freccia, you would have to book a Base fare ticket for the next train to Florence. Since they go every hour, you would arrive 1 hour after the clock started on the Regionali tickets, but if you could get the next train toward Manarola, usually to Pisa, then La Spezia, then Manarola you would not have to buy those tickets again. The trains are frequent enough that you could probably do it.

Main thing, don't miss your starting train, there is no reason to miss it if you are already in Venice. Give yourself a little cushion to get to Santa Lucia station if going by vaporetto. My own experience is that they go right on schedule, but stuff happens.

Fortunately, we didn't need to experience this firsthand on our trip, but I have read in several sites that if you miss a connection when both trains are run by the same operator (e.g. both Trenitalia or both Italo, etc) due to late arriving trains, and there was a minimum of a 15 minute connection window, there is a grace period where you can work with the customer assistance staff and get a ticket for the next train without charge. This even works fur regionale trains and super economy tickets on fast trains. I've also read that this is more difficult if you purchase the tickets through a reseller rather than directly from the train operator.

Thank you all for your input. I really appreciate it. The super Venezia price on the Freccia portion of trip is our first train out of Venice, which we won't miss.