Brand new remodel versus 2 year old remodel value

We are considering staying in our current flip for two years.  We like to have a two year flip going along with other flip projects, to take advantage of the two year rule as often as we can.  The more we fix this one up, the more it's grown on us, but our original plan was to sell.  My question is, all things being equal - i.e., let's say in two years the market in our area is exactly the same as now  - would there be much or any value lost by using all the new appliances and fixtures, etc. for two years?  Needless to say, we'd do our best to keep them in tip-top shape.  I just wonder how much buyers (the market and appraisers) care about everything being brand-spanking new and never used.  I'd be curious on others' experience with this.