Thank you so much for the advice and great points. A few clarifications/ corrections:Hi.
What grinder do you have or plan to purchase? The grinder, obviously, is by far the most important part of the kit. The grinder makes the drink; the espresso machine just pushes water around.
I am not familiar with either machine, but a few things jumped out at me from the pages you linked.
Both are automatic machines. Many view automatics as producing lower-quality espresso than a semi-automatic. There are valid reasons to purchase an automatic, and the previous sentence is not true for every automatic. But, if you have not seriously researched whether you want a semi-auto or an auto, doing that is worth your time.
The Mini does not have pre-infusion built in, which is very odd for what claims to be a high-end machine, but an option is available to add a "pre-infusion chamber." I don't understand why pre-infusion would require a separate chamber, and that raises all sorts of questions in my mind. Just be sure you research the issue.
The Vivaldi is a plumb-only machine, ie, no water tank and you have to hook it up to your home water supply. Not a huge deal, I plumb my machines, but be sure this is what you want.
The Mini cannot be plumbed (either the supply or the drain). I would not purchase such a machine, but you will have to decide whether this matters to you.
The Vivaldi comes stock with a steam wand with only one hole. If you are serious about white coffee, you would want to change/upgrade this.
53mm portafilters? Check to see whether they can use standard baskets. Neither machine is E61, which is fine, but check to be sure Strada or VST baskets are available for the machines.
Sorry, I am leaving you with more questions than advice.....but these are things I would consider in evaluating the machines.
Chris' Coffee is a GREAT shop, by the way.
Best of luck with your purchase!
I have a Mazzer Mini grinder.
It is true the machines offer an auto mode (volumetric dosing), but semi-automatic operation is also possible (manual on/off for the pump).
The pre-infusion chamber is said to mimic the characteristics of an E61 group. Many users online report it makes little difference.
I will not plumb in a machine, so a front-loading tank is perfect for me.
The Dream T (which I've just bought) has a steam tip with four 0.9mm holes. Steaming performance is said to be great on the Spaz machines.
No 53mm Strada or VST baskets available (yet). Admittedly a downside of La Spaziale, but the thinner, deeper basket is said (by some) to give better distribution than the "standard" 58mm.
Thanks for the kind wishes, and I'm sure I'll be back here with plenty of requests for advice!