Any park you can book through your on-line member account is considered a TT park for you, no matter which name they have in the title.
My membership includes four Encore parks. I don't pay extra for them. Not even the $4 per day 'resort' fee which almost everyone staying less than 30 days pays.
We visit an Encore only park in south Texas once a year to visit our dentists in Mexico. We stay at the park as Passport America because it is cheaper than our TT membership discounted rate.
I've had good response from TT member services with this type of questions.