Your agent should be able to ask for multiple estimated charge sheets for you from the various companies in the area. Title insurance fees are regulated, but the escrow fees are not, so you may see variations there. I have found most of the companies in our area to be competitive and within a reasonable range of each other. Some include every "what if" in their estimate (for example a mobile notary, which you may not use and then wouldn't be charged that fee) Also will depend on your offer terms, are you and Seller splitting title and escrow or is Seller paying 100% owners Title? Then don't forget your lender fees and pre-paid impound account fees, pre-paid HOA fees all add to your closing cost bottom line.
Some Sellers have opened a pre-escrow with a company, quite common if dealing with a trust or probate to verify who has authority to transfer property.