Growth is what has happened — more revenue, more customers, more staff. Scalability is about structure: whether the business can serve significantly more customers without its costs and complexity rising at the same rate. A business can grow steadily without being scalable, and a scalable model can sit still if nothing drives demand.
The practical difference shows up in what each additional unit of work costs you. If serving twice as many customers means twice as many staff, twice the premises and twice the equipment, the model is not especially scalable — which is normal and perfectly viable for many trades. If additional volume flows through the same fixed base, margins improve as you grow.
For plant, transport, construction and similar businesses, capacity is often physically limited by assets. Growth means another vehicle, another machine, another operator. That is a capital problem more than a model problem, and it is a common reason owners look at asset finance rather than trying to fund expansion out of reserves.
Neither is inherently better. Growth without the systems to support it is where quality and cash control tend to slip, and taking on finance to chase volume that has not yet materialised is a genuine risk. Test the plan against your figures, and take advice from your accountant on the numbers. Any borrowing must be affordable regardless of whether the growth arrives.