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Coal tar based products are less expensive. Normally the coalting lasts for 2 years. You might need 4 tanks for a double driveway for the first time sealing. Acrylic based products could last up to 5 years, 2 tanks for 1st time sealing, dry in 24 hours.
Coal tart is oilier and stickier, gives you a "thick" look at first, but it's not easily absorbed by the underlayer so it would be worn out faster.
I picked Acrylic because it lasts longer (I'm lazy). But anyway, the all do their job when properly applied.
The project won't take you too long. You could start shopping today, clean the driveway and apply the first coating tomorrow morning, the second coating on Sunday -- totally 4-5 hours work, finished in 2 days.