Yes on average, you can expect to pay around 1%-1.5% more on interest rates. In addition, arrangement fees tend to be charged as a percentage figure rather than a fixed amount.
Also, it’s worth noting that the lender will probably to want their own solicitor to act for them so you may end up covering the cost of two legal bills.
However, while the initial pricing is higher, many landlords find that the tax advantages outweigh the additional costs.