final style = TextStyle(fontFamily: 'Roboto', backgroundColor: Colors.blue.withAlpha(125), fontSize: 100, height: 1, leadingDistribution: TextLeadingDistribution.even);

  return Directionality(
    textDirection: TextDirection.ltr,
    child: Scaffold(
      body: Center(
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Expanded(
              child: ColoredBox(
                color: Colors.red,
                child: Text.rich(TextSpan(text: 'A'), style: style, strutStyle: StrutStyle.fromTextStyle(style, forceStrutHeight: true), textHeightBehavior: TextHeightBehavior(leadingDistribution: TextLeadingDistribution.even),),
              ),
            ),
            Expanded(
              child: ColoredBox(
                color: Colors.red,
                child: Text.rich(TextSpan(text: 'A'), style: style, strutStyle: StrutStyle.fromTextStyle(style, forceStrutHeight: false), textHeightBehavior: TextHeightBehavior(leadingDistribution: TextLeadingDistribution.even),),
              ),
            ),
            Expanded(
              child: ColoredBox(
                color: Colors.red,
                child: Text.rich(TextSpan(text: 'A'), style: style, strutStyle: StrutStyle.fromTextStyle(style, forceStrutHeight: true), textHeightBehavior: TextHeightBehavior(leadingDistribution: TextLeadingDistribution.proportional),),
              ),
            ),
            Expanded(
              child: ColoredBox(
                color: Colors.red,
                child: Text.rich(TextSpan(text: 'A'), style: style, strutStyle: StrutStyle.fromTextStyle(style, forceStrutHeight: false), textHeightBehavior: TextHeightBehavior(leadingDistribution: TextLeadingDistribution.proportional),),
              ),
            ),
            Expanded(
              child: ColoredBox(
                color: Colors.red,
                child: Text.rich(TextSpan(text: 'A'), style: style, textHeightBehavior: TextHeightBehavior(leadingDistribution: TextLeadingDistribution.proportional),),
              ),
            ),
            Expanded(
              child: ColoredBox(
                color: Colors.red,
                child: Text.rich(TextSpan(text: 'A'), style: style, textHeightBehavior: TextHeightBehavior(leadingDistribution: TextLeadingDistribution.even),),
              ),
            ),
          ],
        ),
      ),
    ),
  );