1) A separate service from GO operating with
2) Separate rolling stock,
This is only partially true: SmartTrack's route is the first GO route that will receive EMUs, so it'll be somewhat distinct.
GO RER is regional rapid transit, while traditional GO is regional commuter trains. GO is transitioning from commuter to AD2W rapid transit. We're already (slowly) seeing that now with Lakeshore 30-min and UPX 15-min, both of which are only 4 years old and 2 years old respectively.
But what really distinctifies SmartTrack is the planned GO RER EMUs being used on this route first (Bramalea-Unionville), so it'd look like a distinct SmartTrack train of some kind -- heck, maybe even "SmartTrack" livery slapped on it as a political prop quid pro quo. But it's still a GO RER EMU deployment, happenstancely prioritized to the SmartTrack routing.
And looking beyond the politics -- economically, it makes sense too from a taxpayer perspective: The station density of this routing, partially forced by Crosstown interchanges and future DRL interchange, definitely merits EMUs on the SmartTrack routing first. (Dense station spacing = needs fast acceleration from stops = perfect for EMUs).
Few other GO routes other than the SmartTrack routing have such tremendous interchange potential (with subways & Crosstown), so I presently don't care about the label -- just that 15-min electrified train service happens ASAP along all routes, but I understand why this routing gets EMUs first.
Wring and shake your fist all you might, branding sheningians aside, Brampton-Unionville still makes sense to get EMUs from a network perspective (DRL/crosstown/infills), whatever label is slapped on the first arriving sets of EMUs tendered. More 15-min(and better) rapid transit routes, we need that bad.
Regardless.
Just make it happen -- GO RER livery or SmartTrack livery -- and sooner.
If they decide to do the political-points move of slapping "SmartTrack" on the EMU trainsets (this may happen if Toronto decides to funds at least part of these trains under the SmartTrack budget).
....Then it will be funny to see the SmartTrack livery train go hourly to Stoufville unplanned -- simply because of logistics: the already-proposed (Metrolinx PDF) short-turning 3 out of 4 trains at Unionville to split the 15-min and hourly EMU service.
Logistically unavoidable, but at least they can proudly announce they brought SmartTrack all the way to Stoufville. (And Aurora for that matter) And Tory saves sufficiently enough face.
3) Separated from GO Train traffic with its own tracks,
Tory might have been making that impression.
But personally, never heard of that worded that way.
But I do read lots about GO upgrading their tracks (electrification). Combined with the desired PTC/CBTC that is already proposed as part of GO RER infrastructure (RER Business Case PDF) --
That is essentially a defacto new "metro-style" track operation system for GO as it progresses from a commuter system to a regional rapid transit system. So pretty much, #3 may ring very well true, except it's GO replacing GO, maybe helped along with muncipal funding acceleration for certain elements (infill stations, priority to receive EMUs first, etc) along the SmartTrack routing.
Good question.
By ~2025 though when it is all operating, I expect it to finally fall under "TTC fare" definition for 416 electrified GO service (and SmartTrack). Inflation-wise by 2025, inflation may force TTC fares to rise to GO levels simply by GO keeping prices fixed at today's approx $4-$5 range with (finally) free transfers to TTC. (costing about $3 in year 2017 funds, inflation-adjusted). There are many ways that fare integration will happen, until it falls under "TTC fare" definitions.
This January 1st, TTC fares just halved in price with a GO transfer, and that's a good incremental step towards 2025.