Should I use the same terms and conditions towards companies?

No, towards business buyers (B2B) you may use different terms and conditions. You do not have to comply with consumer legislation such as the cooling-off period. You are therefore freer to set your own rules for business buyers.However, you must clearly communicate that different rules apply to business buyers and also clearly indicate when a purchase is a business purchase and when it is a consumer purchase. For the sake of simplicity and customer service, many webshops choose to apply the same conditions to consumers and businesses.