What is actually different?
Zoho Books rarely gets chosen on its own merits. It gets chosen because a business already uses Zoho CRM or the wider suite and wants the accounting to sit next to it, which is a perfectly good reason.
Bizzle is one system rather than a suite: the books, the front desk, the inbox and the CRM are lenses on the same data rather than separate products with connectors between them.
The trade-off is familiar. A suite gives you breadth and the ability to adopt pieces separately. One system gives you fewer seams, and seams are where small business data goes to die.