For investors who don't already have meaningful exposure to Australian banks, choosing where to start can feel surprisingly difficult. On paper, the major banks all look similar. They operate in the same market, face the same regulators, and are exposed to the same economic cycles.
But when I look at them through a long-term lens, the differences matter more than the similarities.
If I had to choose between Westpac Banking Corp (ASX: WBC) and Commonwealth Bank of Australia (ASX: CBA) today, I would side with CBA, even though it trades at a premium valuation.
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What Westpac offers investors
Westpac has done a lot of hard work over the past few years to stabilise its business. Cost control has improved, balance sheet metrics are sound, and capital levels remain strong. From an income perspective, it continues to offer an attractive dividend yield, which will appeal to investors focused primarily on income.
However, when I step back, Westpac still feels like a turnaround story rather than a compounding one. Revenue growth has been modest, return on equity lags CBA, and the business has struggled to consistently execute at the same level as the sector leader.
That doesn't make Westpac a bad investment. I just think it makes it less compelling for someone looking to build a core position in the banking sector.
Why CBA stands apart
CBA is in a different category.
It consistently generates the highest returns on equity among the major banks, benefits from a dominant retail banking franchise, and leads the sector in digital capability. Its app engagement, customer data, and technology platform create efficiencies that competitors still struggle to match.
What really stands out to me is execution. CBA has shown time and again that it can grow earnings through the cycle, manage credit risk conservatively, and invest in technology without losing focus on profitability.
Yes, CBA shares trade at a premium multiple. But that premium reflects real advantages, not hype. Investors are paying for predictability, scale, and a business that keeps widening the gap between itself and the rest of the sector.
Valuation versus quality
The biggest objection to buying CBA shares is always the same. It looks expensive.
I understand that concern. But in my experience, avoiding high-quality businesses purely because they trade on higher multiples often leads to missed opportunities. CBA has earned its valuation by delivering superior outcomes for shareholders over long periods, not just in favourable conditions.
For investors with little or no bank exposure, I would rather start with the best operator in the sector than try to squeeze extra yield or short-term value out of a weaker franchise.
Paying up for quality is not always comfortable, but it is often rewarding.
Foolish Takeaway
Westpac is a solid bank and may suit investors chasing yield or betting on a turnaround. But if I'm choosing one bank to anchor a portfolio that currently lacks exposure to the sector, I would pick Commonwealth Bank of Australia.
The valuation is higher, but so is the quality.
For me, owning the best business in the sector and letting it compound over time is a far more comfortable strategy than settling for second best and hoping the gap closes.
