Both personal and company contributions come with some tax advantages.
Personal contributions are entitled to a top-up from the government, typically 20% if you’re a basic rate taxpayer. If you are a Higher-rate, or Additional rate taxpayer, you can claim further tax relief through your self-assessment tax return.
Contributions from your limited company are an expense to the business, so won’t be subject to Corporation Tax.
Generally, limited company contributions help your money go a little further, since you’re not paying both Corporation Tax and income/dividend tax before you save.